SCUDDER. — NORTH AMERICAN TRYXALIN^. 57 



fornia (Tehachapi, Aug. 2, A. P. Morse, the last of an uuusually large 

 size) ; also mountains 12 leagues east of San Luis, Mexico, E. Palmer. 



It has also been credited to Nebraska (Bruner), Wyoming (Thomas), 

 the Yellowstone region (Bruner), Montana (Thomas), and Washington 

 (Bruner). 



The species varies much in coloring, from nearly immaculate to 

 markedly maculate, and also in the length of the tegmiua, which, though 

 rarely as short as the hind femora, may sometimes far surpass them in 

 length. 



Aulocara parallelum sp. nov. 



Head well rounded, rather large and prominent, cinereo-testaceous, 

 feebly infuscated above, and with a broad and broadening postocular, 

 blackish fuscous stripe, extending over the prozona ; summit tumid, the 

 fastigium depressed, with well elevated margins, rather longer than 

 broad, at least in the male, the lateral margins parallel, the front acutan- 

 gulate, particularly in the male ; lateral foveolse triangular, elongate, 

 tolerably well impressed, with coarse raised margins ; frontal costa not 

 very broad, in the male much constricted above and gradually broaden- 

 ing, percurrent and rather deeply sulcate, in the female subequal, obsolete 

 below, faintly sulcate at and below the ocellus. Pronotum dull testaceous, 

 with the postocular stripe mentioned, very broad in front and rapidly 

 narrowing, sometimes extended over the metazona on the upper margin 

 of the lateral lobes, feebly constricted mesially, the metazona plane, the 

 hind margin very broadly obtusangulate, the median carina distinct and 

 percurrent, but feeble or obsolete between the sulci, the lateral carinte 

 diverging, and not greatly, only behind, so that the disk is subequal in 

 width. Tegmina extending to tip of abdomen, well rounded, testaceous, 

 more or less infuscated along the median area and especially in the 

 proximal half ; wings hyaline, the veins glaucous except apically in 

 anterior area where they are fuscous. Hind legs lost in only specimens 

 seen. 



Length of body, ^, 19 mm., 9, 28 mm.; tegmina, ^, 13.5 mm., 

 9 , 20 mm. 



1 ^, 19. Salt Lake Valley, Utah, Aug. 1-4. 



This species is remarkable for the parallelism of the lateral carina} on 

 the prozona, giving a disk of subequal width, and for the lack of decussate 

 markings, combined with the presence of a broad postocular stripe. 



